I am intrigued by these comparisons. I looked up Nolan Ryan , another hard throwing stud with control issues, who did make a name for himself in MLB history BTW. At a similar point in his career, Nolan Ryan was
69-70 Career at age 26 , and after 7 seasons averaged 160.1 innings per year. (lifetime 162 game average 14-13, 3.19era, 232 innings)
So there you have it, maybe the Cubs are aware of this similarity and see a long hard throwing future for Edwin. If he turns out to be Nolan Ryan Jr, that would be a steal! Also Ryan threw some ugly no-hitters, lots of walks too.